Exterior surface configuration of a grill for a vehicle



FIG. 1 is a front view of an exterior surface configuration of a grill for a vehicle according to our novel design; and,

FIG. 2 is a perspective view from the front left of the exterior surface configuration of a grill for a vehicle according to our novel design.

The broken lines included depict environment and are not part of the claimed design. 

The ornamental design for an exterior surface configuration of a grill for a vehicle, as shown and described. 